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An Efficient Agrobacterium-Mediated Genetic Transformation System for Persimmon (Diospyros kaki Thunb.)

文献类型： 外文期刊

作者： Zhang, Meng 1 ; Yang, Sichao 1 ; Chen, Wenxing 1 ; Xu, Liqing 1 ; Guo, Dayong 1 ; Luo, Zhengrong 1 ; Zhang, Qinglin 1 ;

作者机构： 1.Huazhong Agr Univ, Key Lab Hort Plant Biol, Wuhan 430070, Peoples R China

2.Jiangxi Acad Agr Sci, Hort Inst, Nanchang 330200, Jiangxi, Peoples R China

关键词： Agrobacterium; Diospyros; anthocyanidin reductase; GFP; proanthocyanidin; transformation

期刊名称：HORTICULTURAE （ 影响因子：2.923； 五年影响因子：3.582 ）

ISSN：

年卷期： 2022 年 8 卷 5 期

页码：

收录情况： SCI

摘要： Persimmon (Diospyros kaki Thunb.) is an important fruit crop in East Asia and has great commercial potential due to the high demand for fresh edible fruits or processed dried persimmon, as well as its being a source of raw materials for the chemical industry. Genetic engineering has shown great potential in persimmon fruit improvement and compensated for the limitations of conventional breeding. In this study, we developed an efficient transformation system and in vivo regeneration protocol by using the leaf disc culture of 'Gongcheng Shuishi' persimmon through the optimization of different basic media and hormone combinations. Based on the secondary induction system on 1/2DKW (DKW medium) + ZT (2.0 mg/L) + TDZ (0.5 mg/L) and MS (1/2 N) + ZT (2.0 mg/L) + IAA (0.1 mg/L), the callus induction rate and adventitious bud induction rate were 96.0% and 94.0%, respectively, and RNA interference of DkANR (ANR, anthocyanidin reductase) was achieved after transformation, thus resulting in a reduction in proanthocyanidin accumulation. The GFP (green fluorescent protein) fluorescence signal was visualized in the transgenic seedlings with GFP gene cotransformation. A total of 17.9% of the positive regenerated transgenic seedlings with empty vector were confirmed by both hyg gene and 35S promoter PCR analysis. Southern blotting assays showed that 20 positive transgenic persimmon seedlings were obtained from 135 regenerated transformants derived from DkANRi. Altogether, a reliable and highly efficient transformation system was achieved in persimmon, which may contribute to gene function identification and genetic improvement in the future.

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